Title :
A hybrid generator for virbration energy harvesting applications
Author :
Wischke, M. ; Masur, M. ; Woias, P.
Author_Institution :
Dept. of Microsyst. Eng., Univ. of Freiburg, Freiburg, Germany
Abstract :
As vibrations are present almost everywhere in urban infrastructure, they are an excellent source to power wireless sensors. Based on our previous clamped-free cantilever, we have developed a beam-type vibratory energy harvester that is suspended on both sides. In the generator, a piezoelectric and an electromagnetic transducer are merged to increase the power output. Different arrangements of magnet and inductor have been tested. At resonance 300 muW and 120 muW can be drawn with 10m/s2 stimulation and optimal load conditions from the piezoelectric and electromagnetic generator part, respectively.
Keywords :
electromagnetic devices; energy harvesting; piezoelectric transducers; wireless sensor networks; beam-type vibratory energy harvester; clamped-free cantilever; electromagnetic transducer; hybrid generator; piezoelectric transducer; power 120 muW; power 300 muW; power wireless sensors; vibration energy harvesting; Electromagnetic forces; Hybrid power systems; Inductors; Magnetic flux; Magnetic levitation; Piezoelectric materials; Piezoelectric transducers; Power generation; Vibrations; Voltage; electromagnetic; energy harvesting; piezoelectric; power generator; vibrations;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference, 2009. TRANSDUCERS 2009. International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4244-4190-7
Electronic_ISBN :
978-1-4244-4193-8
DOI :
10.1109/SENSOR.2009.5285376
